a lot of political science suggests only twice. in the 1960s, 1960 election when richard nixon came out looking very haggard against the sharp and attractive john f. kennedy, and in 2000 when gore was condescending toward george w. bush. the point is, more than zingers, what seems to affect the outcome is your general likability. how you come across. last point, carol, i saw newt gingrich give advice to mitt romney. he said that these debates. his expert told him it's 85% visual, how you look, 10% how you say something, your tone, and 5%, only 5% what you actually say. that would certainly reinforce this likability prism. >> well, that 5%'s kind of depressing. >> it is. >> well, let me ask you this about likability. remember in 2008, obama had a problem with likability and he's turned that around. he's now the more likable candidate. there is a danger to him to appear unlikable in this debate if he gets too snippy or too condescending or too professorial. >> absolutely because he's coming from a position of authority or power. ever